The Martine Rose x Nike Shox R4 Mule "Safety Orange" is a collaboration by the popular fashion designer on a version of the classic Shox sneaker with a lifestyle-focused look. The Jamaican-British clothing designer applies her signature modern-contemporary design ethos to the Nike Shox R4 running shoe by turning the shoe into a casual slip-on silhouette. The model has an elongated forefoot, a taller heel, and slip-on-style ankle that allows the wearer to slide in and out of the shoe effortlessly. As for the color combination, an orange-to-neon-green gradient inspired by vibrant goalkeeper jerseys from the 1990s gives the Shox R4 Mule by Martine Rose a vibrant look.